petsc-3.10.5 2019-03-28
PetscSFReduceBegin
begin reduction of leafdata into rootdata, to be completed with call to PetscSFReduceEnd()
Synopsis
#include "petscsf.h"
PetscErrorCode PetscSFReduceBegin(PetscSF sf,MPI_Datatype unit,const void *leafdata,void *rootdata,MPI_Op op)
Collective
Input Arguments
| sf | - star forest
|
| unit | - data type
|
| leafdata | - values to reduce
|
| op | - reduction operation
|
Output Arguments
rootdata -result of reduction of values from all leaves of each root
See Also
PetscSFBcastBegin()
Level
intermediate
Location
src/vec/is/sf/interface/sf.c
Examples
src/vec/is/sf/examples/tutorials/ex1.c.html
Implementations
PetscSFReduceBegin_Basic in src/vec/is/sf/impls/basic/sfbasic.c
PetscSFReduceBegin_Window in src/vec/is/sf/impls/window/sfwindow.c
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages